HA71
Gas Detection Controller

The Honeywell Analytics HA71 16 Channel Gas Detection Controller is designed to provide simultaneous display and alarm functions for up to 16 input variables. The HA71 is flexible and configurable, making it ideal for demanding industrial applications.

The HA71 delivers added value through its multiple capabilities—with simultaneous display and alarm functions for up to 16 input variables. A graphic LCD displays monitored data as trends, bar graphs and engineering units. Three adjustable alarm levels are provided per channel. Relay outputs allow control of beacons, horns and other alarm events. A horn relay may be set for steady or pulsing operation.

Analog inputs may be accepted and conditioned via sensor specific analog input cards. Alternatively, the standard Modbus Master port allows input data to be retrieved from Modbus slave devices including the many Modbus compatible Honeywell Analytics sensor transmitter products.

The HA71 is easy to configure and user friendly. Measurement ranges in engineering units, adjustable alarm set-points, dual serial interfaces and many other features combine to allow the HA71 to satisfy the needs of many demanding applications. It is widely used for centralizing the display and alarm processing functions in critical multipoint monitoring applications. These include monitoring of ambient gas detection, rotating machinery, tank levels, flow, temperature and others. Nonvolatile memory retains all configuration data indefinitely. A RS-485 Modbus slave port allows up to 128 HA71’s to be multi-dropped onto a single data highway for interrogation by another Modbus master. HA71’s may also be cascaded by connecting one unit’s master port to another’s slave port.

HA71 options such as discrete alarm relays per channel, 4-20mA I/O, direct sensor input conditioning and others are added by connecting appropriate 8 channel boards (2 required for more than 8 channels) to the economical I2C expansion bus. Familiar “telephone style” cables and connectors interface to this bus. This method allows versatile system configuration of options satisfying the most unusual user applications.

The HA-71-HMI (Human Machine Interface) software (optional) has the ability to monitor up to ten HA71 controllers simultaneously, displaying up to 160 points of detection. It provides complete data display and storage, with real-time channel data available in 24-hour or 15-minute trends, including historical alarm and maintenance data.

General Description

Honeywell Analytics offers a family of gas detection controllers that monitor 2, 4, 8 or 16 points of gas detection. Our controller family delivers robust safety while being cost effective.

The Honeywell digital gas controllers are designed to work in the harshest industrial or commercial environments. A NEMA4x and explosion proof enclosure allows you to place the controllers in all hazardous locations to monitor for toxic gases, combustible gases, and oxygen deficiency.

The controllers are easy to install and feature large graphical LCD display, standard 4-20mA inputs, and non-intrusive inputs for hazardous areas. An optional RS-485 Modbus slave port allows up to 128 HA 40’s to be multi-dropped onto a single data highway for interrogation by another Modbus master. A 10-BaseT Ethernet cable is also available for utilizing the popular Modbus TCP/IP protocol.

The "C" and "US" indicator adjacent to the CSA Mark signifies that the product has been evaluated to the applicable ANSI/UL and CSA Standards for use in the U.S. and Canada. This includes products eligible to bear the NRTL indicator. NRTL, i.e. Nationally Recognized Testing Laboratory, is a designation granted by the U.S. Occupational Safety and Health Administration (OSHA) to laboratories which have been recognized to perform certification to U.S. Standards.

Download brochure and Spec Sheet or contact Manning Systems for complete specifications.